Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTdjZzgtcHE5di14OThx

Sandbox Breakout in realms-shim

Versions of realms-shim prior to 1.2.1 are vulnerable to a Sandbox Breakout. The Realms evaluation function has an option to apply Babel-like transformations to the source code before it reaches the evaluator. One portion of this transform pipeline exposed a primal-Realm object to the rewriting function. Confined code which used the evaluator itself could provide a malicious rewriter function that captured this object, and use it to breach the sandbox.

Recommendation

Upgrade to version 1.2.1 or later.

Permalink: https://github.com/advisories/GHSA-7cg8-pq9v-x98q
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTdjZzgtcHE5di14OThx
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: over 4 years ago
Updated: over 1 year ago

CVSS Score: 9.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Identifiers: GHSA-7cg8-pq9v-x98q
References:

• https://github.com/Agoric/realms-shim/security/advisories/GHSA-7cg8-pq9v-x98q
• https://github.com/advisories/GHSA-7cg8-pq9v-x98q
• https://www.npmjs.com/advisories/1218
• https://snyk.io/vuln/SNYK-JS-REALMSSHIM-536069

Repository: https://github.com/Agoric/realms-shim
Blast Radius: 17.6

Affected Packages